Among those attending will be First Minister Peter Robinson, Deputy First Minister Martin McGuinness and Secretary of State Theresa Villiers. Taoiseach Enda Kenny is a keynote speaker.

Yesterday Ms Villiers and Sinn Fein members met the US Secretary of State John Kerry.

Speaking after the meeting, Ms Villiers said: “At the top of our agenda was the ongoing security situation, recent disturbances, the need to rebalance the economy, and the urgency of introducing measures designed to build a genuinely shared and cohesive future for everyone.

“We also discussed the forthcoming G8 summit in Co Fermanagh in June.”

The Sinn Fein delegation included party leader Gerry Adams, who called the meeting “positive and constructive”.